Endoscope handpiece

ABSTRACT

An endoscope handpiece and system may include an angle of view selector, a depressible button, which may be connected to a lock disposed within a port of the endoscopic handpiece. The system may further provide an endoscope, which may be connected to the handpiece via the port and locked in place by the lock.

TECHNICAL FIELD

This disclosure relates generally to a handpiece for an endoscope usedto assist a surgeon during surgical procedures.

STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT

Not Applicable.

BACKGROUND

Endoscopic surgery is experiencing rapid growth in the medical field.

Endoscopy is a minimally invasive surgical procedure that is used toanalyze the interior of a body cavity or interior surfaces of an organby inserting a tubular member into the body cavity through a minor orminimal incision. A conventional endoscope is generally an instrumentwith a light source and an image sensor or device for visualizing theinterior a body cavity. A wide range of applications have been developedfor the general field of endoscopes including, but not necessarilylimited to: arthroscope, angioscope, bronchoscope, choledochoscope,colonoscope, cytoscope, duodenoscope, enteroscope,esophagogastro-duodenoscope (gastroscope), laparoscope, laryngoscope,nasopharyngo-neproscope, sigmoidoscope, thoracoscope, and utererscope(hereinafter referred to generally as “endoscope” or “scope”). Theadvantages of endoscopy include smaller surgical incisions and less softtissue damage. As a result, there is significantly less discomfort andpain for a patient as well as a decrease in recovery time.

The advantages of minimally invasive surgery performed with the help ofan endoscope are well known and understood in the medical field. As aresult, there have been a growing number of devices for use withendoscopes for delivering, for example, diagnostic, monitoring,treatment, operating instruments, tools, and accessories (collectively,“tools”) into the observation field and working space of the physician'sendoscope.

Endoscopes typically are fashioned from several constituent elements.For example, an endoscope may include a handpiece, which connects to anendoscope element. The endoscope element may connect to a light sourcewhile the handpiece may further connect to a computing device having aprocessor (e.g., an image processing device) that receives and processesdigital visual information obtained from the camera, which may bedisposed, in at least many cases, in the handpiece or at a distal end ofthe scope, for example.

The handpiece of the endoscope is typically the point of interfacebetween a surgeon and an endoscope. Accordingly, conventional handpieceshave focused on ergonomic comfort for the surgeon to interface with theendoscope while also providing a handle to accurately and carefullymanipulate the endoscope. Due to this focus on comfort and manipulationaccuracy in conventional handpieces, many handpiece designs have notcontemplated difficulties in design and assembly of the constituentparts of the endoscope. For example, conventional solutions forattaching an endoscope to an handpiece include using a threadedconnection or couplers that frequently require two people to assemble(e.g., one person to hold the handpiece and another person to installthe endoscope on the handpiece). Such conventional solutions areinconvenient and require additional surgical preparation time, which isundesirable.

Conventional endoscope cameras provide a particular field of view for asurgeon. In other words, the camera in the endoscope shows the surgeon aparticular field of view for observing, for example, the inside of abody. Recent innovations in the art have provided new ways of observingdifferent angles of view in a particular field of view. For example,these innovations allow for a surgeon to select a particular angle ofview within a field of view based on an indication from the surgeon thata particular angle of view within a field of view is desirable. One suchteaching is found within U.S. patent application Ser. No. 16/445,101,filed on Jun. 18, 2019 and entitled “Camera Scope Electronic VariablePrism” which, at least at the time of filing, is a co-owned applicationfor patent with this application for U.S. patent application Ser. No.16/445,101, in one embodiment, teaches that different portions of animage sensor may be read out to provide different angles of view to auser. Accordingly, one object of this application is to provide anembodiment of an endoscopic handpiece that may be used in conjunctionwith the system of U.S. patent application Ser. No. 16/445,101 bydisclosing a device for providing an angle of view selection input on ahandpiece of an endoscope.

It is a further object of this disclosure to provide a handpiece of anendoscope that includes a button, which selectively locks an endoscopeinto the handpiece. It is yet another object of this application toprovide an endoscope that that includes a plurality of user interfaceelements that allow for on-the-fly selection of a particular angle ofview within a field of view of a camera for viewing on a remote display.It is yet a further object of this application to provide an endoscopichandpiece, which includes a button for selectively locking an endoscopeinto the handpiece and also provides user interface elements that allowfor on-the-fly selection of a particular angle of view within a field ofview of a camera for viewing on a remote display.

The features and advantages of the disclosure will be set forth in thedescription that follows, and in part will be apparent from thedescription, or may be learned by the practice of the disclosure withoutundue experimentation. The features and advantages of the disclosure maybe realized and obtained by means of the instruments and combinationsparticularly pointed out herein.

SUMMARY OF THE DISCLOSURE

In one embodiment, an endoscope handpiece is disclosed. The endoscopehandpiece may include an angle of view selector. The endoscope handpiecemay further include a depressible button connected to a lock within aport of the endoscopic handpiece.

In another embodiment, a system is disclosed. The system may include anendoscopic handpiece and an endoscope. The endoscopic handpiece mayinclude a depressible button connected to a lock within a port of theendoscopic handpiece.

BRIEF DESCRIPTION OF THE DRAWINGS

The features and advantages of the disclosure will become apparent froma consideration of the subsequent detailed description presented inconnection with the accompanying drawings in which:

FIG. 1 illustrates side view of an exemplary endoscope system with ahandpiece incorporating an endoscope install/release button and angle ofview selector;

FIG. 2 illustrates a top view of an exemplary endoscopic unit with ahandpiece incorporating an angle of view selector;

FIG. 3 illustrates a bottom view of an exemplary endoscopic unit with ahandpiece incorporating an endoscope install/release button;

FIG. 4 illustrates a horizontal cross section of an exemplary endoscopicunit handpiece with connected endoscope;

FIG. 5 illustrates an exploded view of at least some constituentcomponents of an exemplary endoscopic unit with a handpieceincorporating an endoscope install/release button and an angle of viewselector.

DETAILED DESCRIPTION

For the purposes of promoting an understanding of the principles inaccordance with the disclosure, reference will now be made to theembodiments illustrated in the drawings and specific language will beused to describe the same. It will nevertheless be understood that nolimitation of the scope of the disclosure is thereby intended. Anyalterations and further modifications of the inventive featuresillustrated herein, and any additional applications of the principles ofthe disclosure as illustrated herein, which would normally occur to oneskilled in the relevant art and having possession of this disclosure,are to be considered within the scope of the disclosure claimed.

Before the devices, systems, methods and processes for providing ahandpiece for an endoscope used to assist a surgeon during surgicalprocedures and an image or view optimizing assembly are disclosed anddescribed, it is to be understood that this disclosure is not limited tothe particular embodiments, configurations, or process steps disclosedherein as such embodiments, configurations, or process steps may varysomewhat. It is also to be understood that the terminology employedherein is used for the purpose of describing particular embodiments onlyand is not intended to be limiting since the scope of the disclosurewill be limited only by the appended claims, if any, and equivalentsthereof.

In describing and claiming the subject matter of the disclosure, thefollowing terminology will be used in accordance with the definitionsset out below.

It must be noted that, as used in this specification and the appendedclaims, the singular forms “a,” “an,” and “the” include plural referentsunless the context clearly dictates otherwise.

It must be understood that “field of view” as used herein is intended tocontemplate how much of an image can be seen in terms of degrees orangles as diffracted in liquids.

It must be understood that “angle of view” as used herein is intended tocontemplate an angle at which a field of view is angled in degrees orangles as diffracted in liquids.

As used herein, the terms “comprising,” “including,” “containing,”“characterized by,” and grammatical equivalents thereof are inclusive oropen-ended terms that do not exclude additional, unrecited elements ormethod steps.

As used herein, the phrase “consisting of” and grammatical equivalentsthereof exclude any element, step, or ingredient not specified in theclaim.

As used herein, the phrase “consisting essentially of” and grammaticalequivalents thereof limit the scope of a claim to the specifiedmaterials or steps and those that do not materially affect the basic andnovel characteristic or characteristics of the claimed disclosure.

As used herein, the term “active” as used in relation to a device or toelectronic communication refers to any device or circuit, driven byhardware or software, that has decision making or logic processingcapabilities regarding its operation and/or its condition. Conversely,the term “passive” as used in relation to an imaging device or toelectronic communication refers to a hardware device that is written toand read from only, or a device that does not have any memory or otherelectronic, or physical tracking components and does not include anydecision making or logic processing capabilities regarding its operationand/or its condition.

Referring now to the drawings, and specifically to FIG. 1, an embodimentof the features of the disclosure will be discussed generally. FIG. 1illustrates a side view of an exemplary endoscope system 100 with ahandpiece 105 incorporating an endoscope install/release button 120 andan angle of view selector 110. Handpiece 105 may include both an angleof view selector 110 and an endoscope install/release button 120 or mayinclude one or the other of angle of view selector 110 and endoscopeinstall/release button 120.

As shown in FIG. 1, angle of view selector 110 may be implemented as adial with tactile indicators, which will be discussed below. Angle ofview selector 110 may be positioned on a topmost portion of thehandpiece 105, although other implementations are possible such as oneither side of handpiece 105 to facilitate left or right handedsurgeons. Angle of view selector 110 may further include user interfaceelements 115, which may also facilitate a change of angle of view for acamera (not shown) or may provide user control over other functions ofendoscope system 100 (e.g., turning a light source on and off, turningthe device on and off, etc.). User interface elements 115 may beimplemented as buttons, levers, or any other device for supplying userinput into a handpiece known in the art.

Handpiece 105 may further include a depressible button 120, which may beconnected to a lock, discussed in more detail below, that allows theendoscope 130 to be selectively attached to the handpiece 105 andselectively removed from the handpiece 105 by simple depression ofbutton 120. The function of the lock and button 120 will be discussed inmore detail below.

Handpiece 105 may further include a wire connector 125 that connects thehandpiece 105 to the endoscope system 100, which may receive informationthrough endoscope 130 or that may be generated within handpiece 105 andwhich may also update and change a view of a scene within the field ofview of a camera (not shown). Endoscope system 100 may further includean endoscope rotation element 135, which allows the endoscope to berotated about an axis defined by an endoscope tube 140. The endoscopetube 140 may be selectively inserted into a body of a patient forperforming surgical, inspection, or other operations and inspections.

FIG. 2 illustrates a top view of an exemplary endoscopic unit 200 with ahandpiece 205 incorporating an angle of view selector 210. The angle ofview selector 210 may be implemented as a dial, as shown in FIG. 2, ormay also be implemented as one or more interface elements 215 a, asshown in FIG. 2. As shown in FIG. 2, the angle of view selector 210 isimplemented as a dial, which may be selectively rotated to adjust anangle of view shown on a display based on the field of view of a sceneas viewed through endoscope 245. In one embodiment, angle of viewselector 210 may be implemented to provide three discrete and selectableangles of view, such as 0° (see reference numeral 235), 30° (seereference numeral 230), and 70° (see reference numeral 225). A user mayinteract with the angle of view selector 210 to align a selected angleof view with an indicator 220 positioned on the handpiece 205 in orderto instruct an endoscope system to provide a view of the selected angleof view.

As shown in FIG. 2 and by way of example, a dial is implemented as angleof view selector 210 and has been rotated such that a 30° angle of viewis aligned with indicator 220. In this exemplary case, an electricalsignal may be generated by a sensor (not shown) associated with angle ofview selector 210 (not shown), which indicates to an endoscope systemthat the user has selected a 30° angle of view for the field of viewprovided by the camera (not shown). Angle of view selector 210 may alsoinclude tactile elements 240, which assist a surgeon in turning thedial, increase grip friction, allow the surgeon to turn the dial with asingle finger or a thumb, or otherwise facilitate the turning of thedial. In addition, or alternatively, audio and tactile feedback may beprovided by handpiece 205 that indicates an angle of view that has beenselected by the user without the user having to specifically look atindicator 220 or angle of view selector 210.

As noted above, angle of view selector 210 may also be implemented withuser interface elements, such as one or more user interface elements 215a. An insert 215 b may be used to cover one or more user interfaceelements 215 a in a manner that allows endoscopic unit 200 to remainsealed while the one or more user interface elements 215 a are exposedfor receiving user input. In this embodiment, user interface elements215 a may allow a user to change a selected angle of view independent ofangle of view selector 210. In this manner a user may press adirectional element of one or more interface elements 215 a or anopposite directional element which allows a user to scroll, in acontinuous manner, between different angles of view in a field of view.For example, a user may scroll an angle of view of a field of view from0° to 70° in an incremental manner (e.g., by 1° increments or halfdegree increments, by 2-5 degree increments, by 10 degree increments andetc.). It is possible that a user may also automatically flip between a0° view, a 30° view, and a 70° view with a simple press of a one or moreof user interface elements 215 a as well (or in reverse with a push ofanother of the one or more of user interface elements 215 a).

As previously discussed, endoscopic unit 200 may include an endoscope245 that includes a rotation element 250 and an endoscope tube 255.Endoscope 245 may connect to handpiece 205 using the techniques,devices, and/or systems described herein.

FIG. 3 illustrates a bottom view of the exemplary endoscopic unit 300with a handpiece 305 incorporating an endoscope install/release button310. Endoscope install/release button 310 may be a depressible button,which may be depressed in response to a user pushing on endoscopeinstall/release button 310. When the endoscope install/release button310 is depressed, the endoscope 315 becomes unlocked from the handpiece305 and may be removed by a user simply by pulling the endoscope 315from the handpiece 305. The endoscope 315 may include an endoscoperotation element 320 and an endoscope tube 325. The handpiece 305 mayfurther be connected by a connection 330 to an endoscopic system thatprocesses visual data received from the camera (not shown) through theendoscope 315 and the user interface commands (e.g., a turn of a dial ora press of a button, etc.) provided via the handpiece 305.

FIG. 4 illustrates a horizontal cross section of an exemplary endoscopicunit 400 with a handpiece 405 connected to an endoscope element 460. Theendoscopic unit 400 is shown in FIG. 4 with the handpiece 405 as adiscrete unit, although the handpiece 405 may be connected to anendoscope system. As shown in FIG. 4, the endoscopic unit 400 alsoincludes a dial 410, which receives interaction from a user and, inresponse, causes the endoscope system to alter an angle of view of afield of view of a camera (not shown).

The endoscopic unit 400 further includes a depressible endoscopeinstall/release button 415, which selectively allows the endoscope 460to be installed in and removed from the handpiece 405, as discussedbelow. The handpiece 405 includes a spring element 420, which may beconnected to the endoscope install/release button 415 and allows thebutton 415 to be selectively depressed in response to a user pressing onthe endoscope install/release button 415. The spring element 420 may bebiased to cause the endoscope install/release button 415 to be disposedin and remain in an undepressed condition when pressure is not appliedto the endoscope install/release button 415 by a user's hand or finger.When the endoscope install/release button 415 is depressed, the spring420 compresses and pushes a chamfered dog 425 a towards a top of thehandpiece 405 and allows a corresponding spacer 425 b to fully open aport 430 to receive an endoscope connector 435. The endoscope connector435 may be disposed within port 430 when the endoscope install/releasebutton 415 is depressed (or in some embodiments may be installed simplyby pushing the endoscope connector 435 into port 430 and relying onchamfered dog 425 a to be pushed out of port 430 by endoscope connector435). When the endoscope install/release button 415 returns to anundepressed condition, the chamfered dog 425 a slides into a matingchamfered channel 440 disposed between an endoscope spacer 445 and theendoscope connector 435. The chamfered dog 425 a may include a portionthat is angled to match a corresponding angle of the chamfer inchamfered channel 440 of endoscope 460. The chamfered dog 425 a may alsoinclude a squared or right angle portion, which mates with a frontmostside of the endoscope connector 435 (e.g., a side of the chamferedchannel 440 that is opposite the side of chamfered channel 440 that isangled to mate with chamfered dog 425 a). In this manner, the chamfereddog 425 a secures the endoscope 460 to the handpiece 405 by maintainingcontact between the endoscope connector 435 and the handpiece 405 withinthe port 430 by applying pressure to the endoscope connector 435, whichrigidly retains the endoscope 460 within the port 430.

The endoscope 460 may include a rotation element 455 and an endoscopetube 465, which allows the endoscope 460 to rotate around a horizontalaxis defined by the endoscope tube 465.

FIG. 5 illustrates an exploded view of at least some constituentcomponents of an exemplary endoscope 500 with a handpiece 505incorporating an endoscope install/release button 520 and an angle ofview selector 510. Endoscope 500 may include an angle of view selector510, one or more user interface elements 515 a and an insert 515 b. Thehandpiece 505, angle of view selector 510, and one or more userinterface elements 515 a, and insert 515 b may be similar inimplementation and description to similar elements described above withrespect to FIG. 2. As described herein, the angle of view selector 510may be a dial or implemented as one or more user interface elements 515a to cause an endoscopic system to change an angle of view in a field ofview based on user input. In this manner, a user may interact with anangle of view selector 510 or one or more user interface elements 515 ato adjust the angle of view or field of view according to the user'spreferences. The angle of view selector 510 may trigger a mechanical orelectrical sensor, which causes a signal to be transmitted to anendoscope system that indicates to the endoscope system that aparticular angle of view in the field of view has been selected by theuser.

The handpiece 505 may further include a button 520 having a lock 525 anda chamfered dog 530, which allow an endoscope 540 to be inserted into aport 535 of the handpiece 505 and retained therein, according to theforegoing disclosure. Endoscope 540 may include an endoscope rotationelement 545 and an endoscope tube 550. Endoscope 540 may further includean endoscope connector 555, which includes a chamfered channel 560. Thechamfered channel 560 may interface with the chamfered dog 530 to securethe endoscope 540 within the port 535 of the handpiece 505 according tothe foregoing description.

In this manner, a simple connection is provided between the endoscope540 and the handpiece 505. A user may simply push the endoscope 540 intothe port 535 and as the endoscope connector 555 contacts the chamfereddog 530, the endoscope connector 555 will overcome spring pressureexerted by a spring element (not shown in FIG. 5) to push the chamfereddog 530 out of the path of the endoscope connector 555 in the port 535and allow the endoscope connector 555 to fully seat within the port 535of the handpiece 505. Alternatively, the user may apply pressure to theendoscope install/release button 520 while inserting the endoscopeconnector 555 into the port 535 to a point where the endoscope connector555 passes the chamfered dog 530 and thereafter releases pressure to theendoscope install/release button 520. In either case, the chamfered dog530 may, by pressure exerted by the spring element (not shown in FIG.5), rest within the chamfered channel 530 and secure the endoscope 540to the handpiece 505 according to the foregoing description. To removethe endoscope 540, the endoscope install release button 520 may bedepressed by a user to disengage the chamfered dog 530 from thechamfered channel 560 and allow the endoscope 540 to be removed from thehandpiece 505 through the port 535.

EXAMPLES

The following examples pertain to features of further embodiments of thedisclosure:

In Example 1 of the disclosure, an endoscope handpiece may include anangle of view selector, and a depressible button connected to a lockwithin a port of the endoscopic handpiece.

Example 2 of the disclosure includes the endoscope handpiece of Example1, wherein the angle of view selector is a dial.

Example 3 of the disclosure includes the endoscope handpiece of any ofExamples 1-2, wherein the dial triggers an electronic sensor to selectan angle of view to be displayed.

Example 4 of the disclosure includes the endoscope handpiece of any ofExamples 1-3, wherein the angle of view selected by the dial is 0°, oris 30°, or is 70°.

Example 5 of the disclosure includes the endoscope handpiece of any ofExamples 1-4, wherein the lock includes a chamfered dog.

Example 6 of the disclosure includes the endoscope handpiece of any ofExamples 1-5, wherein the chamfered dog includes an angled portion.

Example 7 of the disclosure includes the endoscope handpiece of any ofExamples 1-6, wherein the chamfered dog includes a square portion.

Example 8 of the disclosure includes the endoscope handpiece of any ofExamples 1-7, wherein the lock includes a spacer disposed opposite of achamfered dog installed on the lock.

Example 9 of the disclosure includes the endoscope handpiece of any ofExamples 1-8, further comprising: one or more user interface elements.

Example 10 of the disclosure includes the endoscope handpiece of any ofExamples 1-9, further comprising a connector connecting the endoscopichandpiece to an image processing device.

In Example 11 of the disclosure, a system includes an endoscopehandpiece that comprises an angle of view selector, and a depressiblebutton connected to a lock within a port of the endoscopic handpiece;and the system further includes an endoscope.

Example 12 of the disclosure includes the system of Example 11, whereinthe angle of view selector is a dial.

Example 13 of the disclosure includes the system of any of Examples11-12, wherein the angle of view selected by the dial is one of 0°, 30°,and 70°.

Example 14 of the disclosure includes the system of any of Examples11-13, wherein the lock includes a chamfered dog.

Example 15 of the disclosure includes the system of any of Examples11-14, wherein the chamfered dog includes an angled portion whichcorresponds to a chamfer in a chamfered channel on the endoscope.

Example 16 of the disclosure includes the system of any of Examples11-15, wherein the chamfered dog includes a square portion whichinterfaces with an endoscope connector on the endoscope.

Example 17 of the disclosure includes the system of any of Examples11-16, wherein the lock includes a chamfered dog which connects to achamfered channel in the endoscope.

Example 18 of the disclosure includes the system of any of Examples11-17, wherein the endoscope connects to the handpiece via the port.

In the foregoing Detailed Description of the Disclosure, variousfeatures of the disclosure are grouped together in a single embodimentfor the purpose of streamlining the disclosure. This method ofdisclosure is not to be interpreted as reflecting an intention that theclaimed disclosure requires more features than are expressly recited ineach claim. Rather, inventive aspects lie in less than all features of asingle foregoing disclosed embodiment.

It is to be understood that the above-described arrangements are onlyillustrative of the application of the principles of the disclosure.Numerous modifications and alternative arrangements may be devised bythose skilled in the art without departing from the spirit and scope ofthe disclosure and the appended claims are intended to cover suchmodifications and arrangements.

Thus, while the disclosure has been shown in the drawings and describedabove with particularity and detail, it will be apparent to those ofordinary skill in the art that numerous modifications, including, butnot limited to, variations in size, materials, shape, form, function andmanner of operation, assembly and use may be made without departing fromthe principles and concepts set forth herein.

Further, where appropriate, functions described herein can be performedin one or more of: hardware, software, firmware, digital components, oranalog components. For example, one or more application specificintegrated circuits (ASICs) or field programmable gate arrays (FPGAs)can be programmed to carry out one or more of the systems and proceduresdescribed herein. Certain terms are used throughout the followingdescription and claims to refer to particular system components. As oneskilled in the art will appreciate, components may be referred to bydifferent names. This document does not intend to distinguish betweencomponents that differ in name, but not function.

The foregoing description has been presented for the purposes ofillustration and description. It is not intended to be exhaustive or tolimit the disclosure to the precise form disclosed. Many modificationsand variations are possible in light of the above teaching. Further, itshould be noted that any or all of the aforementioned alternateimplementations may be used in any combination desired to formadditional hybrid implementations of the disclosure.

Further, although specific implementations of the disclosure have beendescribed and illustrated, the disclosure is not to be limited to thespecific forms or arrangements of parts so described and illustrated.The scope of the disclosure is to be defined by the claims appendedhereto, any future claims submitted here and in different applicationsand their equivalents.

What is claimed is:
 1. An endoscope handpiece comprising: an angle ofview selector, and a depressible button connected to a lock within aport of the endoscopic handpiece; wherein the lock includes a chamfereddog which corresponds to a chamfered channel in an endoscope.
 2. Theendoscopic handpiece of claim 1, wherein the angle of view selector is adial.
 3. The endoscopic handpiece of claim 2, wherein the dial triggersan electronic sensor to select an angle of view to be displayed.
 4. Theendoscopic handpiece of claim 3, wherein the angle of view selected bythe dial is 0°.
 5. The endoscopic handpiece of claim 3, wherein theangle of view selected by the dial is 30°.
 6. The endoscopic handpieceof claim 3, wherein the angle of view selected by the dial is 70°. 7.The endoscopic handpiece of claim 1, wherein the chamfered dog includesan angled portion.
 8. The endoscopic handpiece of claim 1, wherein thechamfered dog includes a right angle portion.
 9. The endoscopichandpiece of claim 1, wherein the lock includes a spacer disposedopposite of the chamfered dog installed on the lock.
 10. The endoscopichandpiece of claim 1, further comprising: one or more user interfaceelements.
 11. The endoscopic handpiece of claim 1, further comprising aconnector connecting the endoscopic handpiece to an image processingdevice.
 12. A system, comprising: an endoscope handpiece comprising: anangle of view selector, and a depressible button connected to a lockwithin a port of the endoscopic handpiece; and an endoscope; wherein thelock includes a chamfered dog which includes an angled portion whichcorresponds to a chamfered channel in the endoscope.
 13. The system ofclaim 12, wherein the angle of view selector is a dial.
 14. The systemof claim 13, wherein the angle of view selected by the dial is one of0°, 30°, and 70°.
 15. The system of claim 12, wherein the chamfered dogincludes a right angle portion which interfaces with an endoscopeconnector on the endoscope.
 16. The system of claim 12, wherein the lockincludes the chamfered dog which connects to the chamfered channel inthe endoscope.
 17. The system of claim 12, wherein the endoscopeconnects to the handpiece via the port.